1/* Define PATH_MAX somehow.  Requires sys/types.h.
2   Copyright (C) 1992, 1999, 2001, 2003, 2005, 2009-2012 Free Software
3   Foundation, Inc.
4
5   This program is free software; you can redistribute it and/or modify
6   it under the terms of the GNU General Public License as published by
7   the Free Software Foundation; either version 3, or (at your option)
8   any later version.
9
10   This program is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13   GNU General Public License for more details.
14
15   You should have received a copy of the GNU General Public License
16   along with this program; if not, see <http://www.gnu.org/licenses/>.  */
17
18#ifndef _PATHMAX_H
19# define _PATHMAX_H
20
21/* POSIX:2008 defines PATH_MAX to be the maximum number of bytes in a filename,
22   including the terminating NUL byte.
23   <http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/limits.h.html>
24   PATH_MAX is not defined on systems which have no limit on filename length,
25   such as GNU/Hurd.
26
27   This file does *not* define PATH_MAX always.  Programs that use this file
28   can handle the GNU/Hurd case in several ways:
29     - Either with a package-wide handling, or with a per-file handling,
30     - Either through a
31         #ifdef PATH_MAX
32       or through a fallback like
33         #ifndef PATH_MAX
34         # define PATH_MAX 8192
35         #endif
36       or through a fallback like
37         #ifndef PATH_MAX
38         # define PATH_MAX pathconf ("/", _PC_PATH_MAX)
39         #endif
40 */
41
42# include <unistd.h>
43
44# include <limits.h>
45
46# ifndef _POSIX_PATH_MAX
47#  define _POSIX_PATH_MAX 256
48# endif
49
50/* Don't include sys/param.h if it already has been.  */
51# if defined HAVE_SYS_PARAM_H && !defined PATH_MAX && !defined MAXPATHLEN
52#  include <sys/param.h>
53# endif
54
55# if !defined PATH_MAX && defined MAXPATHLEN
56#  define PATH_MAX MAXPATHLEN
57# endif
58
59# ifdef __hpux
60/* On HP-UX, PATH_MAX designates the maximum number of bytes in a filename,
61   *not* including the terminating NUL byte, and is set to 1023.
62   Additionally, when _XOPEN_SOURCE is defined to 500 or more, PATH_MAX is
63   not defined at all any more.  */
64#  undef PATH_MAX
65#  define PATH_MAX 1024
66# endif
67
68# if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
69/* The page "Naming Files, Paths, and Namespaces" on msdn.microsoft.com,
70   section "Maximum Path Length Limitation",
71   <http://msdn.microsoft.com/en-us/library/aa365247(v=vs.85).aspx#maxpath>
72   explains that the maximum size of a filename, including the terminating
73   NUL byte, is 260 = 3 + 256 + 1.
74   This is the same value as
75     - FILENAME_MAX in <stdio.h>,
76     - _MAX_PATH in <stdlib.h>,
77     - MAX_PATH in <windef.h>.
78   Undefine the original value, because mingw's <limits.h> gets it wrong.  */
79#  undef PATH_MAX
80#  define PATH_MAX 260
81# endif
82
83#endif /* _PATHMAX_H */
84